Vibrodiagnostic research elements rotor centrifugal fan

Abstract

The first part of the work presents the results of experimental studies to determine the natural frequencies and vibrational shapes of hollow blades filled with foam in the form of impellers for centrifugal fans of the TsCh-70 type. The determination of the values of natural frequencies and modes of oscillations by calculation was carried out according to the FEM program, a comparative evaluation of the calculation and experiment is given. In the second part of the work, the problem of determining the location and dimensions of the cross section of the hollow shaft of the rotor with damage at three natural frequencies of torsional vibrations is considered.